Weaving method for the production of multi-colored ribbons and associated shuttle-type jaquard ribbon looms

ABSTRACT

Weaving method for the production of multi-colored ribbons in any desired geometrical figures and color patterns on a shuttletype Jacquard loom by utilizing a ground warp and differently colored threads, to be interlaced as weft to form the ground and figures, wherein the multi-colored threads for forming the ground and the geometrical pattern are supplied in the warp direction and are picked into the ground warp in the form of weft threads by a plurality of shuttle threads as an insertion weave while the working threads are entrained with the ground warp. These working threads are distributed in accordance with the width of the colored figures on which the differently colored threads are interlaced, one of the shuttle threads inserting the thread which forms the ground weft while the remaining shuttle threads interlace one or more colored threads, either for figures which are disposed in the middle of the ribbon or for figures which extend into the outer ribbon zones.

United States Patent Rath 1 July 31, 1973 [5 WEAVING METHOD FOR THE279,247 10 1914 Germany 139 116 PRODUCTION OF MULTl-COLORED g i rea r1|n.. RIBBONS AND ASSOCIATED 304,962 4/1918 Germany 139/122 WSHUTTLE-TYPE JACQUARD RIBBON 59,731 6/1913 Austria 139/418 LOOMS 85,7019/1921 Austria 139/59 [751 Inventor: I Ewa'd R891, wuppeml- 1232113221133 52222 31.11... 3.1.2123; Ronsdoffr Ge'many 256,193 2/1913 Germany139/418 [731 AS89199 M91098 Company, 2%; "1333 81223311113: 113G353wuppeflal'Ronsdorf and 256,390 8/1926 Great Britain 139 117 W. Schueller& Sohn, 433,350 8/1935 Great Britain 139/190 Wuppertal-Wichlenghausen,both of Germany Primary Examiner-lames Kee Chi Filed: Oct. 4 971Attorney-Abraham A. Saffitz 211 Appl. No.: 186,266 [57] ABSTRACT [30]Foreign Application Priority Dam V Veaving method for the production ofmulti-colored ribbons in any desired geometrical figures and color Oct.21, 1970 Germany P 20 5l 572.4 patterns on a yp Jacquard loom utilizinga ground warp and differently colored threads, to be in- [52] US. Cl139/416, 1.39/59, 1133990111966 terlaced as weft to form the ground andfigures, wherein the multi-colored threads for forming the 2; Dosd 23/0022 5 34 ground and the geometrical pattern are supplied in the l 1 d 0Search warp direction and are picked into the ground warp in 139/417,418, l 17, 54, 190, 383 R, 2 3; the form of eft threads by a pluralityof shuttle threads as an insertion weave while the working threads areentrained with the ground warp. These working threads [56] Referencescued are distributed in accordance withthe width of the col- UNITEDSTATES PATENTS ored figures on which the differently colored threads3,308,855 3/1967 Power et al 139/116 are interlaced, one of the shuttlethreads inserting the 691,370 1/1902 Fischer, 1r. 139/122 W thread whichforms the ground weft while the remain- 1 L 10/197l i 139/20 X ingshuttle threads interlace one or more colored gf h -je threads, eitherfor figures which are disposed in the 1sc er, r 751,384 2 1904 Cunliffeet al. 139 117 E 1%; bbon for figures Wh'ch extend 1,750,670 3 1930Hunter 139 59 8 er zonesl,803,509 5/l93l Sagar 139/190 1 Claim 15Drawing Figures FOREIGN PATENTS OR APPLICATIONS 214,443 10/1909 Germany139/116 77 l- 87 c: 1 :1 e 197 7 i E z k T 792 1 clm j ctr i:: l L I z jI n J .11- e cl: I :l

65-? E E J C! I 5 I I Z rt.- 2: B l Z; 5" TT zlmlT-rn 7 Patented July31, 1973 7 Sheets-Sheet 1 PRIOR ART INVENTOR.

EWALD RATH T 2 R A R m R II III P II H |I||H F u VV FIG. ID

BY WW FIG.|B

FIG. IA

PRlOR ART FIG. IC

PRIOR ART Patented July 31, 1973 7 Sheets-Sheet 4 IN VI NTOR EWALD RA THMM 41% Patented July 31, 1973 3,749,139

7 Sheets-Sheet 5 Fig- 5 INVENTOR. EWALD RATH BY WW w;

Patented July 31, 1973 '7 Sheets-Sheet 7 INVENTOR.

EWALD RAT v BY I WEAVING METHOD FOR THE PRODUCTION OF MULTI-COLOREDRIBBONS AND ASSOCIATED SHUTTLE-TYPE JACQUARD RIBBON LOOMS This inventionrelates to a weaving method for the production of multi-colored ribbonsin any desired geometrical and color pattern on a shuttle-type Jacquardribbon loom by utilizing a ground warp and differently colored threadsto be interlaced as weft to form the ground and figures. The inventionalso relates to a shuttie-type Jacquard ribbon loom for carrying out theweaving method.

The object of the invention is to provide a weaving method which permitsthe production of ribbons with weft figures in any desired number ofdifferent colors and in any desired geometrical and color pattern onconventional Jacquard looms with a plurality of shuttles, and in whichthe number of colors of the ribbon is greater than the number ofshuttles of the loom. The term geometrical pattern as utilized in thepresent application is used in the most-general sense since, accordingto the invention, it is possible for flower patterns, abstractornaments, inscriptions, and the like, to

be'woven in any desired surface pattern.

The weavingmethod according to the invention is characterized in thatthe multi-colored threads for forming the ground and the'figures aresupplied in the warp direction and are-picked into the ground warp inthe form of weft threads by a plurality of shuttle threads as aninsertion weave. The present method is also characterized in thatworking threads are entrained with the ground warp, these workingthreads being distributed in accordance with the width of the coloredfigures and on which the differently colored threads are interlaced, oneof the shuttle threads inserting the thread which forms the ground weftwhile the remaining shuttle threads interlace one or more coloredthreads for figures which are disposed in the middle of the ribbon orfor figures which extend into the outer ribbon zones.

According to the invention, the weaving method is utilized as aninsertion weaving for forming the weft of the entire ribbon, themultiple coloring and pattern of the ribbon being unlimited. On the onehand, this enables ribbons with eight or ten colors to be produced onconventional shuttle-type Jacquard looms and, on the other hand, itachieves the special advantage that the entire thread material, utilizedfor theweft and introduced in the warp direction, may be drawn off fromlarge supply reels while-the shuttle or shuttles pick only one or morecatch threads" into the fabric, the function of the catch threads" beingto insert'the colored threads which are supplied in the warp directioninto the ribbon to extend substantially only in the warp direction inthe finished ribbon.

Accordingly, only a very small quantity of shuttle threads is consumedsince, to achieve a defined ribbon length, it is merely necessary toprovide shuttle thread sections of the same length, so that the shuttlebobbins need be exchanged for new bobbins only after relatively longworking periods, for example, after weeks. This results in a substantialsaving of operating time as compared with conventional weaving methodsin which the weft is directly picked by the shuttle and in which theshuttle bobbin change is required after only a few hours and representsthe principal operating time, necessitating frequent shutdown of theloom.

The working threads which perform. a number of functions and which havea critical significance in the method of the present invention produce abetter reverse pattern of the material since the reversing positions ofthe differently colored inserted weft threads are distributed over thewidth of the ribbon. Since these weft threads are necessarily the causeof bead-like thickenings of the ribbon at their reversing positions,distribution thereof over different working threads results in a ribbonwhich is more uniform in its entirety. Moreover, the working threadsretain the excess length of inserted threads extending beyond thepattern width on the reverse of the ribbon, resulting in simplerprocessing of the ribbon when it is sewn into a garment or the like.Moreover, the working threads result in a saving of weft material due tothe reversing positions being closer to the pattern positions.Furthermore,'the-working threads enable shuttle threads, otherwisevisible in the cloth image, to be concealed on the reverse of theribbon. Finally, the working threads function essentially to permitcomplete freedom in the selection of the geometrical and color patternsof the ribbon.

in a further embodiment of the invention, it is possible to ensure thateach working thread is subdivided into two partial working threads whichoperate in opposition to each other. This counteracts the'formation ofperforations within the ribbonand improvestheappearance of the cloth.

in the weaving method according to the present invention, it is alsoadvantageous if the colored threads which are to be inserted as weft arebriefly stored on the supply side and are supplied with a tension whichis substantially lower than that of the ground warp threads and of theworking threads. These measures take into account the jerk-likeconsumption of the colored weft thread material during the weavingoperation.

The method described hereinabove for producing multicolored ribbons isparticularly economical and advantageous because it may be performed onconventional shuttle-type Jacquard looms and, in particular, on coarsepitch looms. In conventional shuttle-type Jacquard looms, the shed isclosed after every-weft has been picked, i.e., after a forward andreverse motion of the shuttle, and the weft thread is pressed againstthe edge of the material. In the weaving method according to the presentinvention on'such a Jacquard loom, this results in the ground warpthreads being moved twice as frequently and results in the slay beingbeaten up twice as frequently as would be necessary in terms of weavingtechnology.

In order to avoid these unnecessary motions of the ground warp threadsand of the slay, it is proposed in a further embodiment of the inventionthat the shed be closed and the slay beaten up after every shuttle pickresulting in the insertion of a weft andthat the ground warp threads beretained in the open shed position after the intermediate shuttlepicking motion which results in gripping of the thread to be inserted.Accordingly, the invention ensures that in the novel method, a weft,namely a double weft thread, is picked only by every second picking ofthe shuttle thread (forward motion of the shuttle) where the shuttlethread itself is not interlaced over the width of the ribbon but'is tobe returned to the edge or working thread during the return motion ofthe shuttle. The present invention, therefore, avoids beating up of theshuttle thread, which is subsequently drawn back in any case, thusavoiding unnecessary changeover of the ground warp threads and thereforeeliminating trouble sources in the weaving operation.

To perform the weaving method described herein, the invention proposesto use a conventional Jacquard ribbon loom with supply means for theground warp and with several shuttles, the loom being additionallyprovided with supply means for the colored ribbons to be inserted, thesesupply means comprising supports for the thread supply reels, threadbrakes, short-period stores for the threads, and a thread spacer, theseparts being disposed upstream of the harness in the aforementionedsequence, and in which the shuttle thread exit in the shuttle orshuttles of the loom is displaced laterally towards one of thelongitudinal ends of the shuttle bobbin.

According to the invention, it is possible by means of these relativelyinsignificant supplementary components to utilize conventional Jacquardlooms for the production of ribbons in any desired multi-coloredconfiguration, thus dispensing with the need for constructing orproviding separate looms for this purpose. The essential advantages ofthe invention are due particularly to the utilization of conventionalshuttle-type Jacquard looms for the production of ribbons in a hithertounknown multi-colored configuration and to the possibility of utilizingextremely thick colored threads as weft material.

In a special embodiment of the loom according to the invention, ashort-period store is provided for each colored weft thread, the weftthread being guided through this store by means of reversing eyelets orthe like in looped form, at least one reversing eyelet being mounted ona tension spring which acts against the direction of thread draw-off. Onthe one hand, this tension spring maintains the desired thread tensionand, on the other hand, permits a jerk-like thread draw-off accompaniedby corresponding emptying of the store which is once again refilledunderthe action of the tension spring in preparation for the nextoperating cycle. According to a further feature of the invention, thedistance between the reversing eyelets of the short-period store withrespect to an increase or reduction of the thread loop formed in theshort-period store may be adjusted so that the storage capacity may beadapted to the rhythmic thread consumption which depends on the size ofthe pattern.

According to the invention, the spacer for weft threads supplied in thewarp direction is provided with thread guides disposed at a distance of5 to mm, thus providing the necessary freedom for reliable, individualcontrol of the threads.

In a further embodiment of the invention, the heald eyes of the harnessassociated with the colored weft threads are larger than the heald eyesassociated with the ground warp. This reduces the friction within theheald eyes of the weft threads which are drawn off in jerked manner.

A further special feature of the loom of the present invention is due tothe fact that the harness cords associated with the colored weft threadshave a higher tensile or weight loading than the remaining harnesscords, the lower ends of the first-mentioned harness cords being securedthrough tension springs to retaining means. This counteracts anyexcessive deflection of the harness cords due to jerky draw-off of theweft threads.

According to the invention, it is also possible for the front or rearedge of the harness board to be provided with separate guides,preferably in the form of hooks, for the interchangeable accommodationof the harness cords which are associated with the working threads. Thissimplifies distribution of the working threads over the width of theground warp and facilitates the subsequent re-arrangement of suchworking threads. Moreover, this offers the further advantage ofpermitting the working threads to be beaten on to the same position inthe Jacquard card so that drawing work for the individual ribbonpatterns can be substantially simplified.

In order to avoid the above-mentioned unnecessary motions of the groundwarp threads and of the slay, which would still result in a conventionalJacquard loom provided with the above-described supplementary apparatus,the present invention proposes that a Jacquard loom be provided with agriffe for controlling the lifters, the griffe being subdivided into aninner griffe associated with the ground warp threads and an outer griffeassociated with the threads to be inserted, the working threads and theshuttle row change, the outer griffe being fixedly coupled to thereciprocating drive of the loom and being adapted to perform one strokefor each loom cycle and the inner griffe being separately controllable.I

To this end and in a special embodiment of the loom according to thepresent invention, the outer griffe is mounted fixedly on a frame onwhich the inner griffe bears loosely, interlocking means actuated fromthe main loom shaft through a reduction transmission being associatedwith the inner griffe to retain it in its raised position during eachsecond loom cycle. Accord ing to further features of the invention, itis possible for the outer griffe to comprise two sections which surroundthe inner griffe, the lifters for the threads to be inserted and theshuttle row change being associated with one section and the lifters forthe working threads being associated with the other section.

Finally, according to the invention, the loom drive comprises agearwheel which is mounted on the main shaft and is adapted to mesh witha gearwheel having twice the number of teeth, both gearwheels having aseparate push-rod connected thereto, the free ends of which are hingedlyjoined to each other by means of a link, and the pivoting lever forsupporting the slay is hinged approximately on the longitudinal middleof that link.

The invention will now be explained with reference to the accompanyingdrawing, in which:

FIGS. la, lb, 1c and 1d illustrate, in four successive working stages,the weaving of a ribbon by the insertion method, a shuttle threadinserting a thread supplied in the warp direction in the form of adouble weft thread over the entire width of the ribbon;

FIGS. 2a, 2b and 2c illustrate the weaving of a threecolored ribbon bymeans of two shuttles using three differently colored threads for theweft and utilizing two working threads, in which FIG. 2a is the reverseside of the cloth, FIG. 2b is the facing side of the cloth having asmaller number of threads in the ground warp compared with FIG. 2a andbeing shown to a reduced scale, and FIG. 20 is a section along lineIIc-Hc of FIG. 217;

FIG. 3 illustrates the weaving of a nine-colored ribbon, woven in theexemplified embodiment by means of a four-shuttle loom;

FIG. 4 shows, partially in diagrammatic form, a Jacquard loom withdifferent additional apparatus and modifications for performing theweaving method according to the invention;

FIG. 5 shows, in simplified and perspective view, one embodiment of thegriffe according to the invention;

FIG. 6 is a diagrammatic view showing an embodiment for the loom slaydrive according to the invention; and,

FIGS. 7 to 10 show a pluralith of successive operating positions of theslay drive according to FIG. 6.

FIGS. 1a, 1b, 1c and 1d show, in four successive working steps,insertion weaving. A thread 2 is supplied in the warp direction adjacentto the ground warp 1. The shuttle picks the shuttle thread 3 from theleft into the open shed (FIG. 1a), whereupon the thread 2 is lowered(FIG. lb) so that the shuttle thread 3 surrounds the thread 2 during itsreturn and inserts it as a double weft thread into the open shed (FIG.10). The front reed 4 beats up the thread 2 which is picked as a doubleweft, whereupon the shed is changed in the ground warp and the pickingoperation is repeated.

FIGS. 2a, 2b and 2c show a three-colored ribbon produced completely inaccordance with the method of insertion weaving. In practice, the ribbonis preferably woven with its reverse side (FIG. 2a) uppermost. On theside which is opposite to the ground position of the two shuttles 11 and12, three different colored weft threads 13, 14, 15 are supplied in thewarp direction adjacent to the ground warp 10, the weft thread 15 7being drawn by the shuttle 12 or its shuttle thread 16 over the entireribbon width for forming the ground, while the weft threads 13, 14 areinserted by the shuttle 11 or its shuttle thread 17 into the middleribbon zone between the working threads 181/182 and 191/192 whichoperate in pairs and in opposition to each other. While forming coloredfigures and in accordance with the method of controlling the groundwarp, the weft threads l3, l4 reciprocate for a certain distance (or areinterlocked) on the facing side (FIG. 2b) of the ribbon or on thereverse side of the ribbon as far as their reversing positions in thezone of the working threads 181/182 and 191/192. The relatively thinshuttle thread 17 extends in the finished ribbon alongside the workingthreads 181/182. In contrast to the simplified view illustrated in FIG.2, the shuttle thread 17 is actually coiled around the working threads181/182. The other shuttle thread 16 extends in the same manner, also inthe warp direction, in the finished ribbon so that the shuttle threadsare consumed only in the same length as the length of the ribbon that isbeing produced. All remaining threads of the ribbon are supplied in thewarp direction and, thus, may be drawn off from large supply reels.

FIG. 3 illustrates a nine-colored ribbon with the ground color I and thecolored figures 11 to 1X. The method of production, indicateddiagrammatically, operates with four shuttles 31, 32, 33 and 34, sixpairs of working threads 351-356, and nine differently colored threadsin the thread group 36. The threads of the thread group 36 are providedwith the same Roman numerals as the associated color figures or theground I. The weft threads to be inserted by the shuttles are markedtherein in brackets and the weft threads I to IX, reversed on the pairsof working threads, are also marked in brackets. The distribution of thereversing positions of the different colored weft threads of the threadgroup 36 over the width of the ribbon is illustrated on the folded-backpart of the ribbon, this method improving the appearance of the reverseside of the cloth and producing a relatively even ribbon. The groundweft l is reversed on the externally disposed threads of the groundwarp. The threads of the shuttles 31, 32, 33 and 34 extend (in a mannernot shown) in the finished ribbon in the aforementioned sequence and arecoiled around the right-hand outer ground warp thread and the pairs ofworking threads 354, 355 and 356.

FIG 4 shows, in diagrammatic form, a Jacquard loom for producingmulti-colored ribbons as, for example, the ribbon illustrated in FIG. 3.The ground warp 40 is supplied in the usual manner to the weavingposition 41 while being controlled by a harness 42. The working threads43, 44 are entrained with the ground warp 40, the harness cords 45 ofthese working threads being passed through hook guides 47 which aredisposed at the front edge of the harness board 46 to permit resettingof the working threads in simple manner and enabling the working threadsto be beaten up at the same position in the Jacquard card.

The threads used as weft in the weaving method according to theinvention are supplied as a thread group 48 laterally adjacent to theground warp 40 to the weaving position 41. The threads of the threadgroup 48 are drawn off from relatively large supply reels 49 (only oneof these is shown in the drawing) and extend over individual brakes 50and over individual shortperiod stores 51 to a spacer 52, the guideelements 53 of which provide a spacing of approximately 5 to 10 mmbetween the individual threads 48. The spacer 52 is referred tohereinafter as the thread spacing distributor. Each short-period store51 comprises a reversing eye 55, disposed on a frontal rod 54 and an eye56 which is rearwardly disposed relative to the former and is mounted ona tension spring 57 which acts against the thread draw-off direction.Due to the presence of the reversing eyes 55, 56, the thread 48 forms aloop in the short-period store 51. The tension spring 57 permits jerkypull-off of the thread 48 and subsequently ensures the formation of athread loop in the shortperiod store so that a sufficient thread supplylength is available in the short-period store 51 for each weaving cycle.The rod 54 with the frontal reversing eyes is adjustable relative to thetension spring 57 together with its reversing eye 56, namely in thesense of increasing or decreasing the thread loop formed in theshort-period store so that the store capacity may be adapted to thethread consumption of each weaving cycle.

The threads 48 extend from the thread spacing distributor 52 throughheald eyes 58 of the harness 42. The heald eyes 58 are relatively largein order to reduce friction of the threads in said eyes. The harnesscords 59 with the heald eyes 58 are tied at their lower ends by means oftension springs 60 to a stationary holder 61 to'ensure verticalorientation of the harness cords 59 despite the jerky draw-off of thethreads 48. The harness cords may also be loaded by weights to anincreasing extent instead of being tied by means of tension springs 60.

In the interest of simplicity, FIG. 4 shows a slay with only oneshuttle, but a slay with a plurality of shuttles must be used forperforming the present method.

As may be further seen by reference to FlG. 4, the thread exit 63 of theshuttle 62 is laterally offset towards the end of the shuttle bobbin sothat almost the entire interior of the shuttle is available foraccommodating and elongating the tensioning spring 64 for the shuttlethread. This ensures in a simple manner that the shuttle thread hassufficient tension, even during the return motion of the shuttle duringwhich the weft thread is inserted.

- FIG. shows a two-part griffe 65, which may be exchanged for the griffeof conventional Jacquard ribbon looms, and having a frame 66 which ismounted on a bar 67 coupled to the reciprocating drive 68 of theJacquard ribbon loom. The griffe 65 is subdivided into an outer griffehaving the two sections 69 and 70 and into an inner griffe 71. Thesections 69, 70 of the outer griffe are rigidly mounted on the frame 66and are, therefore, raised and lowered in the direction of the arrow Awith each loom cycle. The inner griffe 71 is provided with lateral arms72 by means of which it bears loosely on the frame 66.

In the illustrated position, the interlocking levers 73 reach below theends of the arm 72 so that the inner griffe 71 cannot participate in thedownward motion of the frame 66.

The interlocking levers 73, disposed on each side of the inner griffe71, are rigidly mounted on a rod 75, supported in the frame 74, thefront ends of rod 75 supporting a rigidly mounted pivoting lever 76.Tension springs 77, which bias the interlocking levers 73 inwardly inorder to interlock the inner griffe 71, act on the pivoting levers 76.The pivoting motion of the parts 73, 75, 76 is limited by the stopabutment 78.

A ram 79 with the ram plate 80 reaches below the free ends of thepivoting levers 76. The ram 79 is vertically reciprocated by a disc cam81 against the force exerted by the spring 77. The disc cam 81 ismounted on a shaft 82 which is coupled through a 1:2 reductiontransmission 83 to the main shaft 84 of the loom.

The method of operation of the above described apparatus is as follows.The lifters of the ground warp threads are associated with the innergriffe 71 while the lifters of the working threads are associated withthe section 69 of the outer griffe, and the lifters for the threads tobe drawn in and for the shuttle row interchange are associated with thesection 70 of the outer griffe. The control system for unlocking theinner griffe is adjusted so that the inner griffe is unlocked after ashuttle pass which results in a double weft thread being inserted sothat during this operating cycle both the inner and outer griffe arelowered and once again raised by the reciprocating drive 68. On beingraised once again, the interlocking levers 73 reach below the arms 72and retain the inner griffe 71 at the top for the next operating cycleof the loom. Accordingly, the griffe 71 performs a reciprocating motiononly for every second operating cycle, i.e., for every second rotationof the main shaft 84, while it retains the ground warp threads in theopen shed position during the intermediate operating cycles.

FIG. 6 illustrates a modified drive for the slay 85 in adaptation to theweaving method of the present invention. The slay 85 is mounted on apivoting lever 86 which, in conventional slay drives, is hinged throughthe push-rod 87 directly onto a crank pin of a flywheel mounted on themain shaft 84 so that the slay 85 performs its beat motion with eachrotation of the main shaft. On the other hand, in the illustratedapparatus, every second beat up motion of the slay is suppressed by theuse ofa special quadrilateral link, so that the slay performs its beatmotion only for the first, third, fifth, etc. rotation of the main shaft84.

The special quadrilateral link comprises a gearwheel 88, meshing with agearwheel 89 with twice the number of teeth and being disposed on themain shaft 84. The external end face of each of the two gearwheels isprovided with a separate crankpin, one of which is hinged to thepush-rod 87 and the other of which is hinged to the'push-rod 90. Thefree ends of the push-rods 87, 90 are coupled to each other by means ofa link 91. The pivoting lever 86 which supports the slay 85 is hingedapproximately to the longitudinal middle 92 of the link 91.

FIG. 7 shows the special quadrilateral linkage in a position in whichthe gearwheel-side crankpins of both push-rods 87, 90 are in theirfrontal position and the slay is correspondingly moved into the frontalposition.

After rotation of the main shaft 84 through (FIG. 8), the slay will havebeen transferred into its retracted position.

Further rotation of the main shaft 84 through 180 (FIG. 9) enables thecrankpin of the gearwheel 88 to move to the front, but this forwardmotion is compensated by the reverse displacement of the crankpin of thegearwheel 89 so that the slay remains in its rear position.

After a further half-rotation (FIG. 10), the push-rod motions will alsocompensate each other and the slay will remain in the rear position.

It is only during a fourth half-rotation of the main shaft 84 that bothpush-rods 87,90 once again move forwardly in the same sense into theposition illustrated in FIG. 7 so that the slay beats up the weft,namely the inserted double weft, onto the edge of the cloth only withevery second operating cycle of the loom.

What is claimed is:

1. A weaving method for the production of multicolored ribbons in anydesired geometrical figures or color patterns on a shuttle-type Jacquardloom having at least two replaceable shuttles, each carrying a threadpackage comprising:

a. providing ground warp threads;

b. providing at least two pairs of working threads guided as warpthreads and distributed across the width of the geometrical figure whichare built up;

c. supplying differently colored threads and guiding them in the warpdirection;

d. 1. building up a shed of ground warp threads with said pairs ofworking threads and said differently colored threads in the upperposition;

2. and beating in a weft thread from the thread package of one of saidshuttles;

3. lowering one of said differently colored threads;

4. returning the thread of said one shuttle with the returned threadwinding around the lowered differently colored thread in then drawingthe differently colored thread into the shed as a loop ex tending overthe entire width of the ribbon;

5. closing the shed and beating up;

e. I. building up a new shed with said two pairs of working threads andthe ground warp threads which lie between said pairs of working threadswith the outer ground warp threads in lower posi- 10 5. closing the shedand heating up and (f) repeating the sequence of building steps (d) and(e) so that between two successive steps of (d) the ground warp threadsalways change at each shedding and between two successive steps of (e)in each pair, the working threads of each pair change at shedding andone of the differently colored threads which is lowered is drawn intothe shed and is each time selected according to and under the control ofthe color pattern of the Jacquard loom.

1. A weaving method for the production of multi-colored ribbons in anydesired geometrical figures or color patterns on a shuttle-type Jacquardloom having at least two replaceable shuttles, each carrying a threadpackage comprising: a. providing ground warp threads; b. providing atleast two pairs of working threads guided as warp threads anddistributed across the width of the geometrical figure which are builtup; c. supplying differently colored threads and guiding them in thewarp direction; d.
 1. building up a shed of ground warp threads withsaid pairs of working threads and said differently colored threads inthe upper position;
 2. and beating in a weft thread from the threadpackage of one of said shuttles;
 3. lowering one of said differentlycolored threads;
 4. returning the thread of said one shuttle with thereturned thread winding around the lowered differently colored thread inthen drawing the differently colored thread into the shed as a loopextending over the entire width of the ribbon;
 5. closing the shed andbeating up; e.
 1. building up a new shed with said two pairs of workingthreads and the ground warp threads which lie between said pairs ofworking threads with the outer ground warp threads in lower position andthe differently colored threads in upper position;
 2. changing theshuttles to replace the one shuttle with another, inserting and beatingin a weft thread carried by said other shuttle;
 3. lowering another oneof said differently colored threads;
 4. returning said other shuttlewith the threads thereof engaging and winding around the other lowereddifferently colored thread and thus drawing it into the shed in the formof a loop extending between the pairs of working threads;
 5. closing theshed and beating up and (f) repeating the sequence of building steps (d)and (e) so that between two successive steps of (d) the ground warpthreads always change at each shedding and between two successive stepsof (e) in each pair, the working threads of each pair change at sheddingand one of the differently colored threads which is lowered is drawninto the shed and is each time selected according to and under thecontrol of the color pattern of the Jacquard loom.
 2. and beating in aweft thread from the thread package of one of said shuttles;
 2. changingthe shuttles to replace the one shuttle with another, inserting andbeating in a weft thread carried by said other shuttle;
 3. loweringanother one of said differently colored threads;
 3. lowering one of saiddifferently colored threads;
 4. returning the thread of said one shuttlewith the returned thread winding around the lowered differently coloredthread in then drawing the differently colored thread into the shed as aloop extending over the entire width of the ribbon;
 4. returning saidother shuttle with the threads thereof engaging and winding around theother lowered differently colored thread and thus drawing it into theshed in the form of a loop extending between the pairs of workingthreads;
 5. closing the shed and beating up and (f) repeating thesequence of building steps (d) and (e) so that between two successivesteps of (d) the ground warp threads always change at each shedding andbetween two successive steps of (e) in each pair, the working threads ofeach pair change at shedding and one of the differently colored threadswhich is lowered is drawn into the shed and is each time selectedaccording to and under the control of the color pattern of the Jacquardloom.
 5. closing the shed and beating up; e.
 1. building up a new shedwith said two pairs of working threads and the ground warp threads whichlie between said pairs of working threads with the outer ground warpthreads in lower position and the differently colored threads in upperposition;